In-situ synthesis and reaction mechanism of β-SiAlON in the Al-Si₃N₄-Al₂O₃ composite material

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• 作者：Peng Jiang^a ; Xiaofang Wu^a ; Wendong Xue^a ; Junhong Chen^a ; Wei Wang^b ; Yong Li^a ; ^{lirefractory@vip.sina.com" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Al-Si3N4-Al2O3 composite material ; In-situ synthesis ; β-SiAlON ; Reaction mechanism
• 刊名：Ceramics International
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：43
• 期：1
• 页码：1335-1340
• 全文大小：998 K

文摘

An Al-Si₃N₄-Al₂O₃ composite material has been successfully prepared by sintering at 1300 °C under nitrogen atmosphere, and X-ray diffraction, scanning electronic microscopy, and electronic differential system were used for its characterization. β-SiAlON with Z=1 (Si₅AlON₇) appears in the as-synthesized composite material as a reinforcing phase leading to an improvement of the overall physical properties of the Al-Si₃N₄-Al₂O₃ composite. The thermal dynamic analysis of the reaction indicates that Al reacts to Al₄C₃ and Al₄O₄C. Our thermal dynamic analysis reveals that the addition of Si₃N₄ to Al₄O₄C leads to the formation of β-SiAlON.